Andrew Chant | 07a97da | 2018-02-05 15:55:02 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "UsbAlsaJackDetectorJNI" |
| 18 | #include "utils/Log.h" |
| 19 | |
| 20 | #include "jni.h" |
| 21 | #include <nativehelper/JNIHelp.h> |
| 22 | #include "android_runtime/AndroidRuntime.h" |
| 23 | #include "android_runtime/Log.h" |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | #include <asm/byteorder.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <fcntl.h> |
| 31 | |
| 32 | #include <tinyalsa/asoundlib.h> |
| 33 | |
| 34 | #define DRIVER_NAME "/dev/usb_accessory" |
| 35 | |
| 36 | #define USB_IN_JACK_NAME "USB in Jack" |
| 37 | #define USB_OUT_JACK_NAME "USB out Jack" |
| 38 | |
| 39 | namespace android |
| 40 | { |
| 41 | |
| 42 | static jboolean is_jack_connected(jint card, const char* control) { |
| 43 | struct mixer* card_mixer = mixer_open(card); |
| 44 | if (card_mixer == NULL) { |
| 45 | return true; |
| 46 | } |
| 47 | struct mixer_ctl* ctl = mixer_get_ctl_by_name(card_mixer, control); |
| 48 | if (!ctl) { |
| 49 | return true; |
| 50 | } |
| 51 | mixer_ctl_update(ctl); |
| 52 | int val = mixer_ctl_get_value(ctl, 0); |
| 53 | ALOGI("JACK %s - value %d\n", control, val); |
| 54 | mixer_close(card_mixer); |
| 55 | |
| 56 | return val != 0; |
| 57 | } |
| 58 | |
| 59 | static jboolean android_server_UsbAlsaJackDetector_hasJackDetect(JNIEnv* /* env */, |
| 60 | jobject /* thiz */, |
| 61 | jint card) |
| 62 | { |
| 63 | struct mixer* card_mixer = mixer_open(card); |
| 64 | if (card_mixer == NULL) { |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | jboolean has_jack = false; |
| 69 | if ((mixer_get_ctl_by_name(card_mixer, USB_IN_JACK_NAME) != NULL) || |
| 70 | (mixer_get_ctl_by_name(card_mixer, USB_OUT_JACK_NAME) != NULL)) { |
| 71 | has_jack = true; |
| 72 | } |
| 73 | mixer_close(card_mixer); |
| 74 | return has_jack; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | static jboolean android_server_UsbAlsaJackDetector_inputJackConnected(JNIEnv* /* env */, |
| 79 | jobject /* thiz */, |
| 80 | jint card) |
| 81 | { |
| 82 | return is_jack_connected(card, USB_IN_JACK_NAME); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | static jboolean android_server_UsbAlsaJackDetector_outputJackConnected(JNIEnv* /* env */, |
| 87 | jobject /* thiz */, |
| 88 | jint card) |
| 89 | { |
| 90 | return is_jack_connected(card, USB_OUT_JACK_NAME); |
| 91 | } |
| 92 | |
| 93 | static void android_server_UsbAlsaJackDetector_jackDetect(JNIEnv* env, |
| 94 | jobject thiz, |
| 95 | jint card) { |
| 96 | jclass jdclass = env->GetObjectClass(thiz); |
| 97 | jmethodID method_jackDetectCallback = env->GetMethodID(jdclass, "jackDetectCallback", "()Z"); |
| 98 | if (method_jackDetectCallback == NULL) { |
| 99 | ALOGE("Can't find jackDetectCallback"); |
| 100 | return; |
| 101 | } |
| 102 | |
| 103 | struct mixer* m = mixer_open(card); |
| 104 | if (!m) { |
| 105 | ALOGE("Jack detect unable to open mixer\n"); |
| 106 | return; |
| 107 | } |
| 108 | mixer_subscribe_events(m, 1); |
| 109 | do { |
| 110 | |
| 111 | // Wait for a mixer event. Retry if interrupted, exit on error. |
| 112 | int retval; |
| 113 | do { |
| 114 | retval = mixer_wait_event(m, -1); |
| 115 | } while (retval == -EINTR); |
| 116 | if (retval < 0) { |
| 117 | break; |
| 118 | } |
| 119 | mixer_consume_event(m); |
| 120 | } while (env->CallBooleanMethod(thiz, method_jackDetectCallback)); |
| 121 | |
| 122 | mixer_close(m); |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | static const JNINativeMethod method_table[] = { |
| 127 | { "nativeHasJackDetect", "(I)Z", (void*)android_server_UsbAlsaJackDetector_hasJackDetect }, |
| 128 | { "nativeInputJackConnected", "(I)Z", |
| 129 | (void*)android_server_UsbAlsaJackDetector_inputJackConnected }, |
| 130 | { "nativeOutputJackConnected", "(I)Z", |
| 131 | (void*)android_server_UsbAlsaJackDetector_outputJackConnected }, |
| 132 | { "nativeJackDetect", "(I)Z", (void*)android_server_UsbAlsaJackDetector_jackDetect }, |
| 133 | }; |
| 134 | |
| 135 | int register_android_server_UsbAlsaJackDetector(JNIEnv *env) |
| 136 | { |
| 137 | jclass clazz = env->FindClass("com/android/server/usb/UsbAlsaJackDetector"); |
| 138 | if (clazz == NULL) { |
| 139 | ALOGE("Can't find com/android/server/usb/UsbAlsaJackDetector"); |
| 140 | return -1; |
| 141 | } |
| 142 | |
| 143 | if (!jniRegisterNativeMethods(env, "com/android/server/usb/UsbAlsaJackDetector", |
| 144 | method_table, NELEM(method_table))) { |
| 145 | ALOGE("Can't register UsbAlsaJackDetector native methods"); |
| 146 | return -1; |
| 147 | } |
| 148 | |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | } |